Contents: Examination ↓ Replacement ↓
Location of the temperature sensor on the 3F-E engine
1. Windscreen wiper motor; 2. Brake fluid level sensor; 3. Headlight washer motor; 4. Liquid temperature sensors; 5. Oil pressure sensor
Location of the temperature sensor on the 1FZ-FE engine
1. Brake fluid level sensor; 2. Relay block; 3. Liquid temperature sensor; 4. Oil pressure sensor
Examination
1. If the gauge does not register temperature, check the fuses.
2. If the sensor indicates the "Hot" state immediately after starting the cold engine, disconnect the wire from the sensor.
3. If the reading drops, replace the sensor.
4. If the reading remains high, the reasons may be a short circuit to ground in the sensor wire, or a faulty indicator. On the 3F-E engine, the sensor is located under the thermostat.
5. If the sensor stops showing temperature after the engine has fully warmed up (approximately 10 minutes after launch), and the fuses are in good condition, then proceed as follows.
6. Stop the engine, disconnect the wire from the sensor and use a piece of wire to short-circuit the sensor wire to a well-cleaned area of the engine.
7. Turn on the ignition briefly, but do not start the engine.
8. If the indicator now shows "Hot", then replace the sensor.
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9. If there are no sensor readings, the cause may be a break in the circuit or a faulty sensor (see subsection 11.1).
Replacement
1. Disconnect the wire from the sensor.
2. Unscrew the sensor and screw in a new one, tighten securely. Do not use sealant.
3. Connect the wire.
4. Fill with liquid, check the sensor readings.